Those were posted on the Neowin forums on April fools day. I can see MS going with something like that for a UI (just look at the Zune's UI), but I doubt they will.
The first screenshots of Morro have leaked, showing an interface very similar to the one from Windows Defender.
Full Story: Leaked: screenshots of Morro, Microsoft's free antivirus - Ars Technica
http://news.softpedia.com/images/newsrsz/Windows-7-Build-7070-Is-Live-2.png
http://www.softpedia.com//base_img/tb_zoom.gif More crumbs from the Windows 7 Release Candidate branch development are now available with the leaked screenshots for Build 7070. As Microsoft is making headway with the...